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[Official] The AMD Radeon 7800 Owners Club - Page 172

post #1711 of 4099
Quote:
Originally Posted by sena View Post

Yea, i have two HD 7870.
Its really strange problem, i though you were using 12.8 so i wanted to give you advice to try 12.7, but you are already using 12.7, so you dont have much more thing to do.
You could maybe try to RMA again.
EDIT: Now i got gsod in idle with sound loop, and that is with 12.7 beta, AMD drivers are ****ed up.

My GSOD stopped when overclocking after I disabled my on board sound. I'm currently just using sound through HDMI to my monitor. It's still early to call it 100% resolved but it has been almost a week without a single idle GSOD like I would get almost one a day before. It appears a few people are having success with this.
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post #1712 of 4099
Quote:
Originally Posted by Jayjr1105 View Post

My GSOD stopped when overclocking after I disabled my on board sound. I'm currently just using sound through HDMI to my monitor. It's still early to call it 100% resolved but it has been almost a week without a single idle GSOD like I would get almost one a day before. It appears a few people are having success with this.
I was just reading your posts about that, anyway with 12.8 i dont have that problem, but they are poor in other areas, like wrong GPU usage report.

And i have read on forums and looks like someone nailed the problem that started with 12.6, for some users when the card spikes to full clocks in idle, the voltage doesnt, and that causes instant crash.
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post #1713 of 4099
Quote:
Originally Posted by sena View Post

I was just reading your posts about that, anyway with 12.8 i dont have that problem, but they are poor in other areas, like wrong GPU usage report.
And i have read on forums and looks like someone nailed the problem that started with 12.6, for some users when the card spikes to full clocks in idle, the voltage doesnt, and that causes instant crash.

Can you link that source? I'd be interested in reading that.
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post #1714 of 4099
Quote:
Originally Posted by Jayjr1105 View Post

Can you link that source? I'd be interested in reading that.
Here you go mate, somewhere on 3-5 pages, there is story about that.

http://forums.guru3d.com/showthread.php?p=4353182

Altrough there is some differences between GSOD with 12.6 drivers and with 12.7.

With 12.6 the sound is still going in background, and entire PC is working, just gray screen.

With 12.7 the entire PC hardlocked with sound loop, that is leading me to your problem with on board sound card.
Edited by sena - 9/26/12 at 8:53am
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post #1715 of 4099
Quote:
Originally Posted by toolio20 View Post

Still playing around with the 7850 (Sapphire 11200-14-20G) and for the life of me I can't find a way to enable voltage past 1.225v.
I've tried flashing the card with a variety of bios - DCII 7850, Sapphire 7870, others - and they've all failed (that is, no video upon restart forcing a re-flash of the default bios). RBE is RIP.
I've also played around with multiple different versions of GPU Tweak and Afterburner...useless. Trixx does play nice but only takes things so far.
Wouldn't mind some fresh ideas - this card runs 1200 core sub-60C at 1.225v, so I know it can more than handle a little more juice. I just can't seem to provide it mad.gif TIA for any suggestions...

I find my card cannot go past 1.225v either, and changing it up to it, from 1.218v seems to make no difference. I am going to try fitting some ram and vrm sinks, and eventually an antec 620 to overclock it further.

Did you have any luck with flashing the bios?

Also, I have heard that clocking these cards is all about the core first. Mine seems to max out at about 1150mhz, and the memory is happy at 1250mhz so far, which is what the chips are rated for. Is there a memory sweet spot, or a point where it reaches diminishing returns?
post #1716 of 4099
I return!

Here is a puzzle for yall. It may have a bit to add to the 1225mv thing i see in posts above

my asus dcuII 7850 is clocked at 1310mhz stable, 1225mv. Saphire trixx alows me to volt up to 1300mv

here is where it is weird. When stress testing in furmark at 1440x900 i get 46 frames. If i attempt to set the volts any higher than 1225mv, my framrates begin to drop! What gives? I only noticed this after doing my fine tweaking.
Im overjoyed that my card pushed past the 1.3ghz mark, but i want to solve this weird mystery. Are these cards just NOT supposed to go past 1225mv at all? even if the program/bios allows it? Is it some sort of safety feature? glitch?


has anyone else experienced this?

edit -

after a few more tests it became unstable (odd) and not just in a small degree, i had to bump it back down all the way to 1240 mhz HOWEVER i dont seem to be running into the voltage/frame issue in the same way.

but now this happened.-

I wanted to compare the voltage change in heavenmark, so i ran the bench sucsessfuly at 1240mhz 1235mv
i ran the test again at 1240mhz and 1345mv and it failed halfway through... had to reboot.

*rubs chin*
Edited by AlaskaFox - 9/26/12 at 7:55pm
post #1717 of 4099
Quote:
Originally Posted by rievhardt View Post

I did every solution possible but the black screen still exist. It just occured once again last night!
don't you guys experience the same issue? Should I still get a 7870 replacement or just get another card?

Did you disable on board sound? For several of us it looks like it solved the problem. Mine did the same thing.
Edited by di inferi - 9/26/12 at 6:36pm
post #1718 of 4099
Quote:
Originally Posted by AlaskaFox View Post

*snip*

after a few more tests it became unstable (odd) and not just in a small degree, i had to bump it back down all the way to 1240 mhz HOWEVER i dont seem to be running into the voltage/frame issue in the same way.
but now this happened.-
I wanted to compare the voltage change in heavenmark, so i ran the bench sucsessfuly at 1240mhz 1235mv
i ran the test again at 1240mhz and 1345mv and it failed halfway through... had to reboot.
*rubs chin*

That is interesting. It appears that your card really doesn't like excess voltage. For mine, I found that it could only change between 1.218v and 1.225v, and it didn't really like going over stock (1.218v) at all.

What happens if you overvolt to something more conservative like 1245mv? I am wondering at what point the voltage makes it unstable?
post #1719 of 4099
Quote:
Originally Posted by AlaskaFox View Post

I return!
Here is a puzzle for yall. It may have a bit to add to the 1225mv thing i see in posts above
my asus dcuII 7850 is clocked at 1310mhz stable, 1225mv. Saphire trixx alows me to volt up to 1300mv
here is where it is weird. When stress testing in furmark at 1440x900 i get 46 frames. If i attempt to set the volts any higher than 1225mv, my framrates begin to drop! What gives? I only noticed this after doing my fine tweaking.
Im overjoyed that my card pushed past the 1.3ghz mark, but i want to solve this weird mystery. Are these cards just NOT supposed to go past 1225mv at all? even if the program/bios allows it? Is it some sort of safety feature? glitch?
has anyone else experienced this?
edit -
after a few more tests it became unstable (odd) and not just in a small degree, i had to bump it back down all the way to 1240 mhz HOWEVER i dont seem to be running into the voltage/frame issue in the same way.
but now this happened.-
I wanted to compare the voltage change in heavenmark, so i ran the bench sucsessfuly at 1240mhz 1235mv
i ran the test again at 1240mhz and 1345mv and it failed halfway through... had to reboot.
*rubs chin*
My MSI 7850 power edition can go 1300mv max, but it gets hot and preferable spot is around 1260mv for me. But why would you want to up the voltage if your card runs stable? The lesser is voltage, the better it is for your card as far as it is stable. And yes, very high voltage may result in gpu performance degradation. 1345mv is too damn high imo.
post #1720 of 4099
hi,
im looking for a good HD7850?
i want to oced the card to about 1250/1500 or even more(if the card can go that high)
im from israel so the price range is pretty limited and i dont really know what card should i take:
MSI HD 7850 Twin Frozr (900c/4800m)
Sapphire HD7850 (860c/4800m)
Gigabyte HD7850 (975c/4800m)
what card should i take?notice that i want to overclock it to around 1250/5800 or even more.
thanks smile.gif
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